How long to brew rolled oolongs?

Some of the oolongs that I have are tightly rolled. My usual procedure is too just go ahead and add water, then brew for 2.5 minutes, although sometimes I give the tea a rinse before brewing if the tea looks dusty. By the time that I'm ready for the second infusion ( for 3 minutes) the leaves have all unrolled and almost fill the pot -- quite a change from the first infusion.

The tea comes out fine both times, but I'm curious about how others brew rolled oolongs.

I gongfu my oolongs in a gaiwan for the most part, but i usually always give rolled oolong a quick rinse. Not only does that get rid of dust but it starts the tea opening up and gives you more surface area for your first infusion.

My current gaiwan (although looking for another one, among so many other things...) is 4 oz. or 120ml. Depending on what kind of oolong it is and whether it is a rolled one or not I'll use about 1 gram of tea per 30 ml of water and than adjust from there.

I generally don't rinse oolongs unless there is visible tea-dust that I don't want making the infusion bitter, but that's just me.

When gongfu'ing in a gaiwan, you ultimately want the leaf to loosely fill the gaiwan once they're unfurled, without cramming it. I generally find that about 1g per ounce is indeed about right, though I don't really use a scale these days.